/* ==========================================================================
   Design System Variables
   VocSeed - Digital Productivity. Career Intelligence.
   Light & Professional Aesthetic with Blue Primary
   ========================================================================== */

:root {
  /* ========== Color Palette ========== */

  /* Primary - White Background System */
  --color-primary: #ffffff;           /* Main background: pure white */
  --color-primary-light: #f8fafc;     /* Light gray-white */
  --color-primary-dark: #f1f5f9;      /* Slightly darker gray-white */

  /* Secondary - Light Blue Gray */
  --color-secondary: #e2e8f0;
  --color-secondary-light: #f1f5f9;
  --color-secondary-dark: #cbd5e1;

  /* Accent - VocSeed Blue */
  --color-accent: #2196F3;            /* Primary blue */
  --color-accent-light: #64B5F6;      /* Light blue */
  --color-accent-dark: #1976D2;       /* Dark blue */
  --color-accent-glow: rgba(33, 150, 243, 0.3);

  /* Accent Secondary - Golden Yellow (from logo decorative dots) */
  --color-accent-secondary: #FFC107;  /* Golden yellow */
  --color-accent-secondary-glow: rgba(255, 193, 7, 0.3);

  /* Accent Tertiary - Deep Blue */
  --color-accent-tertiary: #1565C0;
  --color-accent-tertiary-glow: rgba(21, 101, 192, 0.3);

  /* Neutrals */
  --color-white: #ffffff;
  --color-black: #000000;
  --color-gray-50: #fafafa;
  --color-gray-100: #f5f5f7;
  --color-gray-200: #e8e8ed;
  --color-gray-300: #d1d1d6;
  --color-gray-400: #aeaeb2;
  --color-gray-500: #8e8e93;
  --color-gray-600: #636366;
  --color-gray-700: #48484a;
  --color-gray-800: #3a3a3c;
  --color-gray-900: #1c1c1e;

  /* Text Colors - Dark System */
  --color-text-primary: #1e293b;      /* Primary text: deep blue-gray */
  --color-text-secondary: #475569;    /* Secondary text */
  --color-text-muted: #94a3b8;        /* Muted text */

  /* Semantic Colors */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;

  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #ffffff 0%, #e3f2fd 50%, #bbdefb 100%);
  --gradient-accent: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  --gradient-accent-hover: linear-gradient(135deg, var(--color-accent-light) 0%, var(--color-accent) 100%);
  --gradient-card: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(255, 255, 255, 0.7) 100%);
  --gradient-text: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  --gradient-glow: radial-gradient(ellipse at center, var(--color-accent-glow) 0%, transparent 70%);
  --gradient-gold: linear-gradient(135deg, var(--color-accent-secondary) 0%, #ffb300 100%);

  /* ========== Typography ========== */

  /* Font Families */
  --font-display: 'Clash Display', 'SF Pro Display', system-ui, sans-serif;
  --font-heading: 'Satoshi', 'SF Pro Display', system-ui, sans-serif;
  --font-body: 'Inter', 'SF Pro Text', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;
  --font-chinese: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;

  /* Font Sizes - Fluid Typography */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
  --text-base: clamp(1rem, 0.925rem + 0.375vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.625vw, 1.375rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.625rem);
  --text-2xl: clamp(1.5rem, 1.25rem + 1.25vw, 2rem);
  --text-3xl: clamp(1.875rem, 1.5rem + 1.875vw, 2.75rem);
  --text-4xl: clamp(2.25rem, 1.75rem + 2.5vw, 3.5rem);
  --text-5xl: clamp(3rem, 2.25rem + 3.75vw, 5rem);
  --text-6xl: clamp(3.75rem, 2.75rem + 5vw, 6.5rem);
  --text-7xl: clamp(4.5rem, 3.25rem + 6.25vw, 8rem);

  /* Font Weights */
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;
  --font-black: 900;

  /* Line Heights */
  --leading-none: 1;
  --leading-tight: 1.15;
  --leading-snug: 1.3;
  --leading-normal: 1.5;
  --leading-relaxed: 1.65;
  --leading-loose: 2;

  /* Letter Spacing */
  --tracking-tighter: -0.05em;
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;
  --tracking-widest: 0.1em;

  /* ========== Spacing Scale ========== */
  --space-0: 0;
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */
  --space-32: 8rem;     /* 128px */
  --space-40: 10rem;    /* 160px */
  --space-48: 12rem;    /* 192px */
  --space-56: 14rem;    /* 224px */
  --space-64: 16rem;    /* 256px */

  /* Section Spacing */
  --section-padding-y: clamp(4rem, 8vw, 8rem);
  --section-padding-x: clamp(1rem, 5vw, 3rem);

  /* ========== Layout ========== */
  --container-xs: 480px;
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1440px;
  --container-max: 1600px;

  /* Grid */
  --grid-columns: 12;
  --grid-gap: clamp(1rem, 2vw, 2rem);

  /* ========== Borders & Radius ========== */
  --radius-none: 0;
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-3xl: 2rem;
  --radius-full: 9999px;

  --border-width: 1px;
  --border-color: rgba(0, 0, 0, 0.08);
  --border-color-hover: rgba(0, 0, 0, 0.15);
  --border-color-accent: rgba(33, 150, 243, 0.3);

  /* ========== Shadows ========== */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.15);
  --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.06);

  /* Glow Shadows */
  --shadow-glow-accent: 0 0 30px var(--color-accent-glow);
  --shadow-glow-gold: 0 0 30px var(--color-accent-secondary-glow);
  --shadow-glow-blue: 0 0 30px var(--color-accent-tertiary-glow);

  /* Card Shadows */
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.08), 0 0 1px rgba(0, 0, 0, 0.1);
  --shadow-card-hover: 0 8px 40px rgba(0, 0, 0, 0.12), 0 0 1px rgba(0, 0, 0, 0.15);

  /* ========== Transitions ========== */
  --duration-instant: 75ms;
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
  --duration-slower: 700ms;
  --duration-slowest: 1000ms;

  /* Easing */
  --ease-linear: linear;
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --ease-elastic: cubic-bezier(0.175, 0.885, 0.32, 1.275);
  --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
  --ease-out-cubic: cubic-bezier(0.33, 1, 0.68, 1);

  /* ========== Z-Index Scale ========== */
  --z-below: -1;
  --z-base: 0;
  --z-raised: 10;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-popover: 500;
  --z-tooltip: 600;
  --z-toast: 700;
  --z-max: 9999;

  /* ========== Glass Effect ========== */
  --glass-bg: rgba(255, 255, 255, 0.8);
  --glass-bg-hover: rgba(255, 255, 255, 0.95);
  --glass-border: rgba(0, 0, 0, 0.08);
  --glass-blur: blur(20px);

  /* ========== Navbar ========== */
  --navbar-height: 80px;
  --navbar-height-scrolled: 64px;
  --navbar-bg: transparent;
  --navbar-bg-scrolled: rgba(255, 255, 255, 0.95);
}